CN105758470B - Distributed force target type meter - Google Patents
Distributed force target type meter Download PDFInfo
- Publication number
- CN105758470B CN105758470B CN201610103338.9A CN201610103338A CN105758470B CN 105758470 B CN105758470 B CN 105758470B CN 201610103338 A CN201610103338 A CN 201610103338A CN 105758470 B CN105758470 B CN 105758470B
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- CN
- China
- Prior art keywords
- target
- target plate
- force
- distributed
- distributed force
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
- G01F1/28—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow by drag-force, e.g. vane type or impact flowmeter
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a kind of operation principles and structure design of distributed force target type meter.The flowmeter is made of measurement pipe, distributed force target plate, target bar, load cell and secondary meter.Distributed force target plate uses the form that honeycombed channel is interspersed with microbarn.The three target bars circumferentially uniformly distributed along measurement pipe connect target plate and three load cells, and wherein target bar and target plate are hinged.Fluid flowing is transmitted on load cell the active force that target plate generates by target bar, is measured by load cell, and measured value can be obtained to the relationship of target plate active force according to flow and fluid.Relative to traditional target type meter, the present invention replaces solid target plate using the distributed force target plate that honeycomb channel is combined with microbarn, simultaneously dynamometry is carried out in circumferential three points of choked flow piece, this design can largely reduce the pulsating force that vortex shedding generates when fluid flows through target plate, reduce the error that velocity flow profile deformity is brought to flow measurement.
Description
Technical field
The present invention relates to flowmeter technology field, specially a kind of distributed force target type meter.
Background technology
Target type meter started to be applied to industrial flow measurement in nineteen sixties, was mainly used for solving high viscous
The flow measurement of degree, low reynolds number fluid.The measuring cell of target type meter is a target plate for being placed on pipeline center, target plate with
Flow channel is formed between pipeline.On fluid impact to target plate, target plate is related with uninterrupted by the active force of fluid, passes through
Load cell measures fluid matasomatism in the active force on target plate, to realize the measurement of flow.
Typical target type meter structure works as fluid as shown in Figure 1, in one piece of round target plate of measurement pipe central coaxial placement
When impacting on target plate, the active force of fluid suffered by target plateF, flow velocityv, Media densityρWith target plate front face areaABetween relationship be
（1）
Wherein,For resistance coefficient.
Flowmeter volume flowAnd mass flowFor
（2）
（3）
In formula,
kDischarge coefficient,
dTarget plate diameter,
DBore is measured,
βDiameter ratioβ=d/D。
The target plate of above-mentioned tradition target type meter is solid, and uses single force snesor.Fluid flows through target plate and will produce
The vortex shedding of opposite rule（Referring to Fig. 2）, pulsation force effect is generated to target plate so that measuring signal pulsating quantity is larger；It is another
Aspect acts on point of resultant force on target plate and deviates target plate center so that opplied moment when Bottomhole pressure glances offLHair
Changing（Referring to Fig. 3）, flow measuring data accuracy is caused to be affected.If target plate is designed to porous plate or honeycomb
Form, and use multiple sensors（Three comparisons are reasonable）It is arranged circumferentially carry out dynamometry in flow measurement buret, then may be used
Largely reduce the influence that velocity flow profile deformity is brought to flow measurement, and the arteries and veins of vortex shedding generation can be greatly reduced
Power acts on.
Invention content
For the problem that the solid target type meter signal pulsating quantity of traditional single-sensor is big and straight pipe requirement is long, the present invention
Target plate is designed as distributed force target plate, i.e. the distributed force target plate of honeycomb channels and multiple microbarn interlaced arrangements, and uses three
The load cell being arranged circumferentially along measurement pipe measures target plate stress.Its specific implementation mode is as follows：
A kind of distributed force target type meter, by measurement pipe, distributed force target plate, target bar, load cell and signal processing with
Display output unit forms, and flow measurement is realized by measuring power of the fluid matasomatism on distributed force target plate.
Further, the distributed force target plate is using honeycomb channels and microbarn interlaced arrangement.
Further, gap very little between the distributed force target plate and measurement pipe, the fluid force suffered by target plate are logical
It crosses target bar and is transmitted to load cell.
Further, fluid force suffered by target plate is measured using along three circumferentially uniformly distributed load cells of measurement pipe,
Fluid is equal to the sum of three power measured by three force snesors to the active force of target plate.
Further, the target bar connects distributed force target plate and three load cells, wherein target bar and distribution
It is hinged between power target plate.
The invention has the advantages that：
1）Using the distributed force target plate of honeycomb channels and microbarn interlaced arrangement.This target plate has preferable rectification to flowing
Effect can significantly reduce the pulsating force that vortex shedding is brought, and reduce pulsating quantity in measuring signal so that signal processing is simpler
Folk prescription just, while improving accuracy of measurement.
2）Active force of the target plate by fluid is measured using three load cells being arranged circumferentially, can be reduced because of stream
The error that speed distribution deformity is brought to measurement, can reduce requirement of the flowmeter to upstream flow development length.
Description of the drawings
Fig. 1 is exemplary target formula flowmeter structure schematic diagram；
Fig. 2 is target plate vortex shedding schematic diagram；
Fig. 3 is target type meter load-sensing unit stress and deformation schematic diagram；
Fig. 4 a are the structural schematic diagram of distributed force target type meter；
Fig. 4 b are distributed force target type meter A-A sectional views；
Fig. 5 is distributed force target plate sectional view；
Fig. 6 is distributed force target plate force analysis figure；
Fig. 7 a are that fluid acts on point of force application schematic diagram to target plate when flow velocity is distributed in perfect symmetry；
Fig. 7 b are that fluid acts on point of force application schematic diagram to target plate when flow velocity deformity is distributed.
Each reference numeral meaning in figure：
1- measurement pipes；2- distributed force target plates；3- target bars；4- load cells；5- signal processings and display output unit；6-
Signal wire；7- honeycomb channels；8- microbarns.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings.
As shown in Figs. 4a and 4b, distributed force target type meter of the invention is by measurement pipe 1, distributed force target plate 2, target bar 3, survey
Force snesor 4, signal processing and display output unit 5 and signal wire 6 form.
When fluid flows through flowmeter, power is acted to distributed force target plate 2, which is transmitted to dynamometry by target bar 3
Sensor 4, the signal that three load cells measure focus on signal processing by signal wire 6 and are calculated with display output unit 5
Processing obtains institute's flow measurement magnitude, and is shown, stored and exported.
As shown in figure 5, form of the distributed force target plate 2 using honeycomb channels 7 and 8 interlaced arrangement of microbarn, distributed force target plate 2
There is rectified action while sensing fluid force；Distributed force target plate 2 and measurement pipe（1）It is not contacted between inner wall, but the two
Between gap very little, fully to sense fluid force；Target bar（3）It is hinged, the two only strong work between distributed force target plate 2
With without moment loading.Fluid force suffered by distributed force target plate 2 is transmitted to load cell 4 by target bar 3, three
The signal that load cell measures focuses on signal processing by signal wire 6 and obtains being surveyed with 5 calculation processing of display output unit
Flow value, and shown, stored and exported.
As shown in fig. 6, due to being hinged between target plate and target bar, the distance between hinged place to sensor is the arm of forceL 1 、L 2 、L 3 It is to determine constant, fluid force suffered by target plateFThe sum of three power measured by numerically equal to three load cells,
I.e.：
(4)
When measurement pipe inner fluid speed is distributed asymmetry（Deformity）When, active force of the fluid to target plateFAction center not
It is pipeline center again（Referring to Fig. 7）If target plate matches single sensor, measured power will also change（Fig. 3）, and it is right
The numerical value of three force snesor schemes in the present invention, institute's dynamometry is not influenced by point of resultant force change in location.Therefore, it uses
Its upstream flow development length of the distributed force target type meter of the present invention requires more traditional single-sensor flowmeter that can substantially reduce.
Claims (2)
1. a kind of distributed force target type meter, by measurement pipe（1）, distributed force target plate（2）, target bar（3）, load cell（4）With
Signal processing and display output unit（5）Composition, it is characterised in that：By measuring fluid matasomatism in distributed force target plate（2）On
Power realizes flow measurement；The distributed force target plate（2）Using honeycomb channels（7）With microbarn（8）Interlaced arrangement；The distributed force
Target plate（2）With measurement pipe（1）Between gap very little, the fluid force suffered by target plate passes through target bar（3）It is transmitted to dynamometry biography
Sensor（4）；Fluid force suffered by target plate is measured using along three circumferentially uniformly distributed load cells of measurement pipe, fluid is to target plate
Active force be equal to the sum of three power measured by three force snesors.
2. a kind of distributed force target type meter according to claim 1, it is characterised in that：The target bar（3）By distributed force
Target plate（2）With three load cells（4）It connects, wherein target bar（3）With distributed force target plate（2）Between be hinged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610103338.9A CN105758470B (en) | 2016-02-25 | 2016-02-25 | Distributed force target type meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610103338.9A CN105758470B (en) | 2016-02-25 | 2016-02-25 | Distributed force target type meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105758470A CN105758470A (en) | 2016-07-13 |
| CN105758470B true CN105758470B (en) | 2018-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610103338.9A Expired - Fee Related CN105758470B (en) | 2016-02-25 | 2016-02-25 | Distributed force target type meter |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675069A (en) * | 2016-03-08 | 2016-06-15 | 中国计量学院 | Distributed force laminar flow meter |
| US10704935B2 (en) | 2016-12-04 | 2020-07-07 | Buoy Labs, Inc. | Fluid flow detector with tethered drag block |
| USD866375S1 (en) | 2017-08-02 | 2019-11-12 | Buoy Labs, Inc. | Water flow monitoring device |
| US11781895B2 (en) | 2018-02-23 | 2023-10-10 | Buoy Labs, Inc. | Fluid flow analysis and management |
| CN107831332A (en) * | 2017-12-07 | 2018-03-23 | 广东电网有限责任公司电力科学研究院 | A kind of transient state oil stream velocity measuring device during transformer short-circuit impact |
| CN108533872B (en) * | 2018-04-24 | 2023-06-20 | 西南交通大学 | Device for improving stability of liquid flow |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1078305A (en) * | 1992-12-12 | 1993-11-10 | 通辽发电总厂 | Twin fulcrum target type flow sensor |
| CN201285294Y (en) * | 2008-07-24 | 2009-08-05 | 林挺明 | Moment type flowmeter |
| CN201740548U (en) * | 2010-04-17 | 2011-02-09 | 邱国雄 | High-precision quantum flowmeter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7921726B2 (en) * | 2006-06-12 | 2011-04-12 | Precision Pumping Systems, Inc. | Fluid sensor with mechanical positional feedback |
-
2016
- 2016-02-25 CN CN201610103338.9A patent/CN105758470B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1078305A (en) * | 1992-12-12 | 1993-11-10 | 通辽发电总厂 | Twin fulcrum target type flow sensor |
| CN201285294Y (en) * | 2008-07-24 | 2009-08-05 | 林挺明 | Moment type flowmeter |
| CN201740548U (en) * | 2010-04-17 | 2011-02-09 | 邱国雄 | High-precision quantum flowmeter |
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| CN105758470A (en) | 2016-07-13 |
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